Promo Item Discounted Picking Fee

There are a lot of businesses that want to include a brochures/promo items in their orders, like magnets or keychains, that type of thing. It is a loss for the client to have to pay a full unit pick fee for these very inexpensive items. It would be amazing if ShipEdge could designate a specific reduced promo item pick rate for SKUs that I designate as a promo item.